Comment Comment by danpat https://en.wikipedia.org/wiki/Wideband_audioand more specific to cellular phones:https://en.wikipedia.org/wiki/Adaptive_Multi-Rate_WidebandSearch for "HD Voice" from the big cellular companies in the US. It usually requires handset support. parent danpat 10 years ago
and more specific to cellular phones:
https://en.wikipedia.org/wiki/Adaptive_Multi-Rate_Wideband
Search for "HD Voice" from the big cellular companies in the US. It usually requires handset support.